/*
 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 *
 * Author: Adam Dunkels <adam@sics.se>
 *
 */
#ifndef __LWIP_API_H__
#define __LWIP_API_H__

#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/sys.h"

#include "lwip/ip.h"

#include "lwip/raw.h"
#include "lwip/udp.h"
#include "lwip/tcp.h"

#include "lwip/err.h"

#define NETCONN_NOCOPY 0x00
#define NETCONN_COPY   0x01

enum netconn_type {
    NETCONN_TCP,
    NETCONN_UDP,
    NETCONN_UDPLITE,
    NETCONN_UDPNOCHKSUM,
    NETCONN_RAW
};

enum netconn_state {
    NETCONN_NONE,
    NETCONN_WRITE,
    NETCONN_ACCEPT,
    NETCONN_RECV,
    NETCONN_CONNECT,
    NETCONN_CLOSE
};

enum netconn_evt {
    NETCONN_EVT_RCVPLUS,
    NETCONN_EVT_RCVMINUS,
    NETCONN_EVT_SENDPLUS,
    NETCONN_EVT_SENDMINUS
};

struct netbuf
{
    struct pbuf *p, *ptr;
    struct ip_addr *fromaddr;
    u16_t fromport;
};

struct netconn
{
    enum netconn_type type;
    enum netconn_state state;
    union
    {
        struct tcp_pcb *tcp;
        struct udp_pcb *udp;
        struct raw_pcb *raw;
    } pcb;
    err_t err;
    sys_mbox_t mbox;
    sys_mbox_t recvmbox;
    sys_mbox_t acceptmbox;
    sys_sem_t sem;
    int socket;
    s16_t recv_avail;
    void (*callback)(struct netconn *, enum netconn_evt, u16_t len);
};

/* Network buffer functions: */
struct netbuf *netbuf_new(void);
void netbuf_delete(struct netbuf *buf);
void *netbuf_alloc(struct netbuf *buf, u16_t size);
void netbuf_free(struct netbuf *buf);
err_t netbuf_ref(struct netbuf *buf,
                 void *dataptr, u16_t size);
void netbuf_chain(struct netbuf *head,
                  struct netbuf *tail);

err_t netbuf_data(struct netbuf *buf,
                  void **dataptr, u16_t *len);
s8_t netbuf_next(struct netbuf *buf);
void netbuf_first(struct netbuf *buf);
void netbuf_copy_partial(struct netbuf *buf, void *dataptr,
                         u16_t len, u16_t offset);

#define netbuf_fromaddr(b)              (b->fromaddr)
#define netbuf_fromport(b)              (b->fromport)
#define netbuf_len(b)                   (b->p->tot_len)
#define netbuf_first(b)                 (b->ptr = b->p)
#define netconn_new(t)                  netconn_new_with_proto_and_callback((t), 0, NULL)
#define netconn_new_with_callback(t, c) netconn_new_with_proto_and_callback((t), 0, (c))
#define netconn_type(c)                 (c->type)

/* Network connection functions: */
struct
    netconn *
    netconn_new_with_proto_and_callback(enum netconn_type t, u16_t proto,
                                        void (*callback)(struct netconn *, enum netconn_evt, u16_t len));
err_t netconn_delete(struct netconn *conn);
err_t netconn_peer(struct netconn *conn,
                   struct ip_addr *addr,
                   u16_t *port);
err_t netconn_addr(struct netconn *conn,
                   struct ip_addr **addr,
                   u16_t *port);
err_t netconn_bind(struct netconn *conn,
                   struct ip_addr *addr,
                   u16_t port);
err_t netconn_connect(struct netconn *conn,
                      struct ip_addr *addr,
                      u16_t port);
err_t netconn_disconnect(struct netconn *conn);
err_t netconn_listen(struct netconn *conn);
struct netconn *netconn_accept(struct netconn *conn);
struct netbuf *netconn_recv(struct netconn *conn);
err_t netconn_send(struct netconn *conn,
                   struct netbuf *buf);
err_t netconn_write(struct netconn *conn,
                    void *dataptr, u16_t size,
                    u8_t copy);
err_t netconn_close(struct netconn *conn);

err_t netconn_err(struct netconn *conn);

#endif /* __LWIP_API_H__ */
